A coolant leak may develop from the heater core, requiring replacement of the heater core.Google+
Car Problem Reports
Mitsubishi Diamante Coolant Leak From Heater Core
Mitsubishi Diamante Problem
Average Mileage: 91,735 mi (45,000 mi - 187,000 mi)
Visitor, 2003 Mitsubishi Diamante, 70,100 mi
The problem is the heater core and I want to know if it has been on recall. 2003 Mitsibushi Galant
Visitor, 2000 Mitsubishi Diamante, 45,000 mi
Replaced radiator, but slow coolant leak reoccurred after few months. Foggy front windows, smell of coolant, empty radiator, slight engine overheating. Returned to same mech who replaced radiator, they pressure test and leak check but could not find anything obvious. Finally they diagnosed heater coil leak inside dash. Expensive job to fix, at least $1K. Debating worth it on 12+ year old car, which is otherwise in fantastic driving condition.
Visitor, 2003 Mitsubishi Diamante, 80,000 mi
I noticed a sweet smell coming from heater, call dealer and he said that it was the heater core. He also said that it's a problem in most Diamantes. I ask if there was a recall, told me no :( I put stop leak in the radiator for now
Visitor, 1999 Mitsubishi Diamante, 99,673 mi
i was driving the car after cleaning it and the floor felt wet so i pulled the mat up and it was damp so i pulled the plastic off under the glove box and felt a lot of condonsation on the white box around the heater core
lots of film on windshield hard to see and hard to get off.
Hard to breath with windows closed. Any Recalls on this problem? Very expensive to repair.
syrupy smell, foggy front window, soaked passenger carpet
Visitor, 2001 Mitsubishi Diamante, 120,000 mi
Coolant leak from heater coil. Defrost not defogging windshield.
Visitor, 2002 Mitsubishi Diamante, 75,000 mi
heater core had to be replaced
Visitor, 2003 Mitsubishi Diamante, 54,000 mi
Replaced Heater Core
Visitor, 2002 Mitsubishi Diamante, 90,000 mi
coolant leak from heater core. returned to dealer. at the time i had a extended warranty that covered the parts and service.